I'm the author of minitest-rails . Things have changed a lot from the time you originally asked this to now. My answer assumes you're using minitest-rails.
I recently switched an application from Rspec to Minitest & it was well worth it. Tests run much faster, the syntax encourages smarter, leaner code, & somehow I just have more confidence in the suite now (less magic at work).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.